1915 cushion silver vintage Omega watch

A cushion silver vintage Omega watch, 1915. The case measures 28 x 28 mm. The case is signed Omega, with continental silver mark and numbered 5428126 to the back. The movement is signed Omega and numbered 5675914. The white enamel dial has black one Arabic numerals with a subsidiary seconds dial and blued steel ‘Breguet’ style hands. The dial is signed Omega above the centre.